Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 21/36 and 42/20

1st number: 21/36, 2nd number: 2 2/20

21/36 + 42/20 is 161/60.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 36 and 20 is 180
  2. For the 1st fraction, since 36 × 5 = 180,
    21/36 = 21 × 5/36 × 5 = 105/180
  3. Likewise, for the 2nd fraction, since 20 × 9 = 180,
    42/20 = 42 × 9/20 × 9 = 378/180
  4. Add the two fractions:
    105/180 + 378/180 = 105 + 378/180 = 483/180
  5. 483/180 simplified gives 161/60
  6. So, 21/36 + 42/20 = 161/60
    In mixed form: 241/60

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad

Related:

© everydaycalculation.com